216741733 has 4 divisors (see below), whose sum is σ = 233414188. Its totient is φ = 200069280.

The previous prime is 216741709. The next prime is 216741761. The reversal of 216741733 is 337147612.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 45603009 + 171138724 = 6753^2 + 13082^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216741733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216741533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8336208 + ... + 8336233.

It is an arithmetic number, because the mean of its divisors is an integer number (58353547).

Almost surely, 2^216741733 is an apocalyptic number.

It is an amenable number.

216741733 is a deficient number, since it is larger than the sum of its proper divisors (16672455).

216741733 is a wasteful number, since it uses less digits than its factorization.

216741733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16672454.

The product of its digits is 21168, while the sum is 34.

The square root of 216741733 is about 14722.1510996186. The cubic root of 216741733 is about 600.6860051774.

The spelling of 216741733 in words is "two hundred sixteen million, seven hundred forty-one thousand, seven hundred thirty-three".